Shotter Creek Upper Dam Reservoir Report

Last Updated: May 2, 2026

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Located in Hoonah-Angoon, Alaska, the Shotter Creek Upper Dam stands as a vital hydroelectric structure serving the local community.


Summary

Completed in 1968, this Earth-type dam boasts a height and hydraulic height of 9 feet, with a length of 87 feet and a storage capacity of 58 acre-feet. The dam primarily serves the purposes of hydroelectric power generation and water supply, making it a key asset in the region's water resource management.

Managed by the local government and regulated by the Alaska Department of Natural Resources, the Shotter Creek Upper Dam has been assessed to be in fair condition with a significant hazard potential. Despite its age, the dam has a moderate risk assessment rating, indicating a need for ongoing monitoring and maintenance. With a spillway width of 6 feet and a maximum discharge capability of 100 cubic feet per second, the dam is equipped to handle potential flood events and ensure the safety of surrounding areas.

As a critical infrastructure piece in the Shotter Creek watershed, the Shotter Creek Upper Dam plays a crucial role in supporting the region's energy needs and water supply. With regular inspections and a designated emergency action plan, the dam is prepared to mitigate any risks and ensure the continued safety and reliability of its operations. For water resource and climate enthusiasts, this dam represents a fascinating intersection of human engineering and environmental stewardship in the Alaskan wilderness.

15-Day Long Term Forecast


Year Completed

1968

Dam Length

87

River Or Stream

SHOTTER CREEK

Primary Dam Type

Earth

Hydraulic Height

9

Nid Storage

58

Structural Height

9

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

9
       
Seasonal Comparison

5-Day Hourly Forecast Detail

Dam Data Reference

Condition Assessment

Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
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